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Peng Xi Feng
Ophthalmology
About me
Shenzhen Longgang Central Hospital, Ophthalmology Deputy Chief Physician.
Proficient in diseases
Familiar with the diagnosis of various common eye diseases such as cataracts, glaucoma, eye trauma, and ocular surface diseases, skilled in eye fluorescein angiography, electrophysiology, eye A/B ultrasound and other examinations.
Voices
How many days can conjunctivitis heal?
Conjunctivitis can be categorized by the speed of onset into hyperacute, subacute, acute, and chronic types. It can also be classified by severity into mild, moderate, and severe. Acute conjunctivitis usually is self-limiting, with the condition lasting about two weeks. Effective localized treatment and administration of sensitive antibiotics can lead to recovery within a few days. In contrast, chronic conjunctivitis is not self-limiting and is more challenging to treat.
Can trachoma cause blindness?
Trachoma is a chronic infectious conjunctivitis and keratitis caused by Chlamydia trachomatis, which can lead to blindness if left untreated. After the acute phase of trachoma is cured, it may leave no scars and not affect vision. However, repeated infections can lead to scarring, and in severe cases, complications may endanger vision. Entropion and trichiasis, where eyelashes constantly rub against the cornea, can cause the cornea to become opaque and form ulcers, leading to blindness. Chlamydia trachomatis can cause epithelial keratitis, and at the ends of corneal vascular pannus, corneal infiltration can occur along with entropion and trichiasis, which in turn exacerbates the damage to the cornea, causing opacification and leading to blindness.
What is glaucoma?
Glaucoma is one of the main blinding eye diseases in ophthalmology, with a certain genetic predisposition, affecting 10 to 15 percent of direct relatives of patients. Intraocular pressure is the pressure exerted by the contents within the eyeball against its inner wall. Glaucoma is a group of diseases characterized by distinctive optic nerve atrophy and visual field defects, and pathologically increased intraocular pressure is one of the main risk factors for glaucoma. The level of increased intraocular pressure and the tolerance of the optic nerve to pressure damage are primarily related to the occurrence and progression of glaucomatous optic nerve atrophy and visual field defects.
Does conjunctivitis require isolation?
Infectious conjunctivitis can lead to epidemic infection, therefore it is essential to take preventive measures. Conjunctivitis is often spread through contact, thus it is advocated to frequently wash hands and faces, and avoid wiping eyes with hands or sleeves. Patients with infectious conjunctivitis must be isolated, and any toiletries used by the patients must be isolated and disinfected. Medical staff should also wash and disinfect their hands after examining patients to prevent cross-infection.
Does conjunctivitis require infusion?
Generally, conjunctivitis does not require intravenous treatment. Treatment primarily focuses on targeting the cause and applying local medications, with systemic medication used when necessary. During the acute phase, it is crucial to avoid bandaging the affected eye. The most basic method of administering medication for conjunctivitis is through eye drops, along with the application of eye ointment before sleep. When there is substantial secretion in the conjunctival sac, it needs to be flushed. In severe cases of conjunctivitis, such as gonococcal conjunctivitis, systemic antibiotics are required in addition to local medications.
Does trachoma need treatment?
Trachoma is a chronic infectious conjunctivitis that can lead to blindness, so once diagnosed with trachoma, it is essential to undergo both systemic and local drug treatment. Systemic treatment includes the acute phase, where severe trachoma requires systemic use of antibiotics, generally for three to four weeks. Local treatment involves the application of rifampin, penicillin, and other eye drops, and erythromycin eye ointment, etc., for at least ten to twelve weeks. If complications such as entropion, trichiasis, ptosis, symblepharon, or chronic dacryocystitis occur, surgical correction is necessary.
How long is the incubation period for conjunctivitis?
Hyperacute bacterial conjunctivitis, caused by gonococci or meningococci, is characterized by a short incubation period of 10 hours to two to three days, with rapid disease progression. Acute or subacute bacterial conjunctivitis, also known as acute catarrhal conjunctivitis, commonly known as pink eye, has a sudden onset with an incubation period of one to three days, affecting both eyes either simultaneously or one to two days apart.
Does conjunctivitis require an IV drip?
Conjunctivitis generally does not require intravenous treatment; it is mainly treated according to the cause, with local administration of medication being the primary approach. Systemic medication may be required when necessary. Eye drops are the most basic method of administering medication for conjunctivitis. Eye ointment can also be applied to the eyes; since it remains in the conjunctival sac for a longer duration, it is advisable to use it before bedtime. When there is a lot of secretion in the conjunctival sac, a non-irritating rinse solution can be used to wash the conjunctival sac. In severe cases of conjunctivitis, such as gonococcal conjunctivitis and chlamydial conjunctivitis, systemic antibiotics or sulfa drugs are needed in addition to local treatment.
Causes of cataracts
Various causes, such as aging, genetics, local nutritional disorders, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can lead to metabolic disorders of the lens, causing the denaturation of lens proteins and resulting in cloudiness; this is called cataract. Cataracts can be divided into congenital and acquired. Congenital cataracts, also known as developmental cataracts, are divided into anterior polar cataracts, posterior polar cataracts, nuclear cataracts, and total cataracts. Acquired cataracts are divided into senile cataracts, complicated cataracts, traumatic cataracts, metabolic cataracts, radiation cataracts, and those related to medications and poisoning.
Trachoma conjunctivitis symptoms
Trachoma is a chronic infectious conjunctivitis and keratitis caused by Chlamydia trachomatis, which can lead to blindness. During the acute phase in both eyes, symptoms include redness, pain, foreign body sensation, tearing, and purulent discharge, along with swollen lymph nodes, increased papillary formation in the palpebral conjunctiva, and multiple follicles covering the superior and inferior fornices. After the acute phase, which lasts one to two months, it enters a chronic phase where conjunctival congestion decreases, and the conjunctiva thickens with increased papillary and follicular formation. Complications in the later chronic stage mainly include entropion and trichiasis, eyelid ptosis, symblepharon, essential keratoconjunctivitis sicca, and chronic dacryocystitis leading to corneal opacity, among others.